[[input.y:4.9: warning: rule useless in parser due to conflicts: e: /* empty */ [-Wother]
]])
+AT_BISON_CHECK([-fcaret -o input.c input.y], 0, [],
+[[input.y:4.9: warning: rule useless in parser due to conflicts [-Wother]
+ e: 'e' | /* Nothing. */;
+ ^
+]])
+
AT_CLEANUP